Mechanics review summary
Table of Contents
- Fully define sketches
- Fix warnings in the designs
- Prefer feature patterns to sketch patterns
- Create design assembly of test thrower and test robot chassis to see how the thrower fits
- Make sure that (deformed) ball does not interfere with anything during throw
- Use parts that are available in the lab or are easy to buy
- Use correct length spacers
- Use correct material thickness
- Increase thrower rigidity
- Consider where the thrower motor wires will run
- Reduce wasted material
- Add more material to increase rigidity if necessary
- Improve wheel roller mounting
- Think ahead what screw lengths to use
- Use through holes for threads if possible
- Use correct drill diameters for threaded holes
- Make threaded holes longer so that there is more thread
- Prefer threaded holes to nuts
- Use correct hole sizes for bolts
- Use countersunk screws if necessary or beneficial
- Check for interferences
- For milled parts use internal corner cutouts (dogbones) if needed
- Make sure all the necessary mounting holes have been created
- Make sure that the mounting holes are aligned
- Make sure that there is enough room to place and remove the batteries
- Make sure that the batteries are held in place
- Use correct thrower motor hole pattern
- Make sure that there is right amount of distance between thrower motor and ramp
- Design thrower ramp to be constant distance away from the motor
- Make sure that the distance between thrower motor and the floor is only slightly smaller than the ball
- Make sure that all the parts can be attached to each other
- Add computer power adapter socket cutout
- Use correct size cutouts for switches and computer power adapter socket
- Create cutouts for wires and cables
- Add PCBs/boards to the design
- Make sure that there is enough room for electronics and cables
- Prefer solid parts to adjustable ones
- Consider whether balls can get stuck inside the robot
- Make sure that the chassis is not creating too many blind spots for the camera
- Make sure that the ball will be centered before the throw
- Support wheel rollers from the sides
- Avoid wheel rollers from protruding out of the robot
- Make parts symmetric if it simplifies assembly
- Use appropriate fits
- Increase clearance if needed
- Avoid adding features that make assembly more complicated
- Consider ways to simplify assembly
- Design camera RGB sensor to be in the middle of the robot
- Consider camera field of view during design
- Consider the printing orientation for the parts that will be 3D-printed
- Use thicker layers when 3D-printing
- Consider the manufacturing method when designing
- Avoid modeling threads
- Thrower angle adjustment
- Thrower grabber
- CAM
- Use manufacturing model
- Leave enough space between milled parts
- Do not create multiple setups if not needed
- Make sure that work zero point is on top of the stock
- Order of operations
- Select correct geometry for operations
- Use partial retract drilling
- Do not use Lead In/Out
- Use tabs
- Disable or use negative Stock to Leave to make fitting parts together easier
- Make sure that everything will be milled in manufacturing simulation
Fully define sketches
Reduce wasted material
Use countersunk screws if necessary or beneficial
Check for interferences
Make sure all the necessary mounting holes have been created
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https://github.com/ut-robotics/picr21-team-sauna-madis/issues/4
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https://github.com/ut-robotics/picr21-team-sauna-madis/issues/31
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https://github.com/ut-robotics/picr21-team-tlo-rock/issues/78
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https://github.com/ut-robotics/picr21-team-kurgimopeed/issues/44
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https://github.com/ut-robotics/picr21-team-kurgimopeed/issues/45